448398721 has 8 divisors (see below), whose sum is σ = 454341888. Its totient is φ = 442494000.

The previous prime is 448398701. The next prime is 448398737. The reversal of 448398721 is 127893844.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 448398721 - 2²⁵ = 414844289 is a prime.

It is a super-2 number, since 2×448398721² = 402122825988871682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (448398701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14256 + ... + 33166.

It is an arithmetic number, because the mean of its divisors is an integer number (56792736).

Almost surely, 2^448398721 is an apocalyptic number.

It is an amenable number.

448398721 is a deficient number, since it is larger than the sum of its proper divisors (5943167).

448398721 is a wasteful number, since it uses less digits than its factorization.

448398721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19223.

The product of its digits is 387072, while the sum is 46.

The square root of 448398721 is about 21175.4272920288. The cubic root of 448398721 is about 765.3994075346.

The spelling of 448398721 in words is "four hundred forty-eight million, three hundred ninety-eight thousand, seven hundred twenty-one".